"device_id":"SCN-00123", "message_id":"b3f9c9f2-...-a1", "barcode":"0123456789012", "symbology":"EAN13", "ts":"2026-04-10T12:00:00Z"
| Problem | Solution | |---------|----------| | "Invalid serial key" error | Ensure no spaces before/after. Check for uppercase O vs zero. | | Key works but server connection fails | Windows Firewall may be blocking the software. Add an exception for port 8080 (or your configured port). | | Trial key expired | Contact vendor for extension; some offer free "home use" serials. | | Key tied to old PC (hardware change) | Most vendors allow deactivation via support ticket. | barcode to pc server serial key
: Trial versions often limit the number of scans per session or include "nag screens." Entering a valid key removes these restrictions. "device_id":"SCN-00123", "message_id":"b3f9c9f2-